Spideroak
Overview
 
SpiderOak is an online backup tool for Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac and Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

 users to back up, share, sync, access and store their data using an off-site server. SpiderOak allows the user to backup any given folder of his/her computer. SpiderOak uses encrypted cloud storage and client-side encryption
Client-side encryption
Client-side encryption is the cryptographic technique of encrypting data before it is transmitted to a server in a computer network. Usually, encryption is performed with a key that is not known to the server. Consequently, the service provider is unable to decrypt the hosted data. In order to...

 key creation, so even employees of SpiderOak cannot access users' information (this is the 'zero-knowledge' data encryption).
Quotations

All men have a right to remain in a state of nature as long as they please; and in case of intolerable oppression, civil or religious, to leave the society they belong to, and enter into another.

The Rights of the Colonists (1772)

In regard to religion, mutual toleration in the different professions thereof is what all good and candid minds in all ages have ever practised, and, both by precept and example, inculcated on mankind.

The Rights of the Colonists (1772)

The natural liberty of man is to be free from any superior power on Earth, and not to be under the will or legislative authority of man, but only to have the law of nature for his rule.

The Rights of the Colonists (1772)

 
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